The Las Vegas Springs or Big Springs is the site of a natural oasis, known traditionally as a cienega. For more than 15,000 years, springs broke through the desert floor, creating grassy meadows (called las vegas by Mexican explorers). The bubbling springs were a source of water for Native Americans living here at least 5,000 years ago. Known as The Birthplace of Las Vegas it sustained travelers of the Old Spanish Trail and Mormons who came to settle the West.